Tag: Roof Washing


Roof Washing Details

Recently, there has been considerable interest in washing roofs, including several concerns about what products to use when washing roofs and how to remove certain black streaks and stains (mould algae often referred to as ‘gloeocapsa magma’). The look of every home would be greatly changed by washing roofs to eliminate these stains. The only way to get rid of them in the past was by replacing the roof. It has been estimated that because of the presence of the roof stains and not simply because of its functionality, as many as 50 percent of all roof replacements have been completed.Do you want to learn more? Visit Roof Washing .

Without the proper roof cleaners, these roofing stains are difficult to wash. Caustics for destroying mould are inexpensive and very effective. When washing roofs, bleach is used more frequently, but sometimes with catastrophic results. GAF roofing notes that the use of bleach automatically voids any warranty on an asphalt roof when washing roofs because it breaks down the shingle composition. We have heard that 12 percent bleach concentrations are used by contractors, but many experts agree that this form of roof washing will lead to roof failure within a short period of time.

We use the following strategy when we are power washing roofs for clients: First, we wet the roof slightly to cool it down using an X-Jet. Second, from the deck, we use an X-Jet to add QwicClean’s Roof Cleaner to the shingles. Before we begin power washing, we allow the roof cleaner to run for about 15 minutes. (Note: it costs as little as 70 cents per gallon for Roof Brite, which is less costly than bleach!)

Walking softly on the roof when cleaning, we use very light pressure to clean the roof – around 300 PSI. When washing roofs, we are very cautious to avoid knocking away gravel from the surface of the shingles. We use a very soft scrub brush with a 5′ handle when we catch up with a rough stain area and scrub this area gently. Finally, the surface of the roof would be rinsed well. Rinsing can be achieved using your X-Jet again from the ground.

To avoid falls, steep roof cleaning jobs require special gear. A good roof cleaner, after all, can make any surface pretty slippery. One way to make it easy to walk around while cleaning roofs is to have a chicken ladder along with a rope belt.